Deuter Attack 20 vs. Deuter Trans Alpine Pro 26 SL

Two carry-on travel backpacks, compared spec for spec.

Deuter Attack 20

Front facing view of the Deuter Attack 20
Capacity20 L
Weight1.55 kg
Dimensions50×28×20 cm
Airline fit92%

Feature by feature

Deuter Attack 20FeatureDeuter Trans Alpine Pro 26 SL
Storage
Y Compression Y
None Expanded Capacity None
4 Opening 4
N Passport N
N Passthrough N
Carry
Y Backpack Y
removable Hip Belt Y
Y Sternum Strap Y
Inside
N Laptop N
1 Main Compartments 1
Y Organizer Y
Outside
× Hard Shell ×
Y Rain-fly Y
2 Water Bottle Holder 2
Y Water Resistant Y
Material
600D PES Coat, 225D PES Ripstop600D PES, 100D PA Ripstop

Deuter Trans Alpine Pro 26 SL

Front facing view of the Deuter Trans Alpine Pro 26 SL
Capacity26 L
Weight1.45 kg
Dimensions51×27×20 cm
Airline fit90%
Price$201

Key differences between the Deuter Attack 20 and Deuter Trans Alpine Pro 26 SL

Both have: compression straps, backpack straps, sternum strap, built-in organizer, rain cover, water bottle pockets, water resistant.

Which airlines take each bag as a carry-on

We checked both bags against the carry-on size limits of 189 airlines. 170 accept both. 4 accept only the Deuter Attack 20, and 0 accept only the Deuter Trans Alpine Pro 26 SL.

Only the Deuter Attack 20 fits

Air Niugini, Belavia, Etihad Airways, Qatar Airways.

Deuter Attack 20 vs. Deuter Trans Alpine Pro 26 SL: which should you pack?

The Deuter Trans Alpine Pro 26 SL carries 6L more than the Deuter Attack 20 (20L vs. 26L), while the Deuter Trans Alpine Pro 26 SL is the lighter pack at 1.45kg (vs. 1.55kg). For carry-on flexibility, the Deuter Attack 20 fits 92% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Deuter Trans Alpine Pro 26 SL; if you want to travel lighter, the Deuter Trans Alpine Pro 26 SL is the better call.